OFDM系统存在对数据符号同步和载波频率偏移极为敏感的问题。
The OFDM is sensitive to the synchronization of the OFDM symbol and the carriers' frequency excursion.
研究基于小波变换有效提取信号瞬变特性的功能，对数字调制移相键控(PSK)信号进行符号速率估计。
Studies the function of wavelet transform (WT) that can effectively distill the transient characteristics of digital signals to estimate the symbol rate of PSK signals.
基于对数字电视地面传输系统复杂度和性能代价的综合考虑，提出以符号变换为基础的IC I自消除模块替换卷积码模块。
Based on synthesis consideration of complexity and performance cost, this paper proposed a modified scheme of using the ICI self-cancellation module to replace the convolutional coding module.
所谓数学解释，就是以某种方法对数学某一分支或者构成它的成分，诸如概念、命题、公式、符号等所赋予的各种意义的总和。
The so called maths summary is to summarize, by a certain way, the various meanings of a branch of its structural element such as conception, proposition, formula and sign etc.
限幅法是目前应用较为广泛的一类预畸变峰均比抑制算法，但其会引入额外的限幅噪声，从而对数据信号和导引符号造成干扰，恶化传输性能。
Clipping is a popular method to control the PAPR with distortions, but it introduces additional clipping noise, so as to distort the data and pilot symbols and degrade the system performance.
奇异值分解(SVD)是一种对数据进行降维处理的方法，符号数据分析(SDA)是一种处理海量数据的全新数据分析思路。
Singular Value Decomposition (SVD) is a dimension reduction method, and Symbolic data Analysis (SDA) is a new analytical approach to processing mass data.
这对数组索引是个问题，因为如果带符号扩展的字符为负值，则索引将超出数组范围。
This is a problem for array indexing because the sign-extended characters, being negative, indexes outside the array.
这对数组索引是个问题，因为如果带符号扩展的字符为负值，则索引将超出数组范围。
This is a problem for array indexing because the sign-extended characters, being negative, indexes outside the array.
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